/* 基础变量 */
:root {
    --primary-color: #2b68b2;
    --primary-dark: #08428a;
    --dark-color: #333333;
    --text-color: #666666;
    --light-gray: #f5f5f5;
    --white: #ffffff;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

/* 通用容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏基础样式 */
header {
    background: #f8f9fc;
    box-shadow: 0 2px 15px rgba(8, 66, 138, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

.logo {
    padding: 12px 0;
}

.logo img {
    height: 50px;
    width: auto;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li a {
    display: block;
    padding: 25px 15px;
    color: var(--dark-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-menu li a:hover {
    color: var(--primary-color);
}

/* 页面标题横幅 */
.page-banner {
    position: relative;
    padding: 80px 0;
    background-size: cover;
    background-position: center 30%;
    background-repeat: no-repeat;
    color: var(--white);
}

.page-banner .container {
    text-align: left;
}

.page-banner h1 {
    font-size: 42px;
    font-weight: 600;
    margin-bottom: 15px;
    text-align: left;
}

.page-banner .breadcrumb {
    font-size: 16px;
    text-align: left;
}

.page-banner .breadcrumb a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.page-banner .breadcrumb a:hover {
    opacity: 0.8;
}

/* 页脚样式 */
footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

/* 公司信息区域 */
.footer-info {
    padding-right: 40px;
}

.footer-info img {
    height: 50px;
    margin-bottom: 20px;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 快速链接 */
.footer-links h4,
.footer-services h4,
.footer-contact h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-links ul,
.footer-services ul {
    list-style: none;
}

.footer-links li,
.footer-services li {
    margin-bottom: 10px;
}

.footer-links a,
.footer-services a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover,
.footer-services a:hover {
    color: var(--white);
    padding-left: 5px;
}

/* 联系方式 */
.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
}

/* 版权信息 */
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* 页脚响应式调整 */
@media screen and (max-width: 991px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .footer-info {
        grid-column: 1 / -1;
        padding-right: 0;
        text-align: center;
    }
}

@media screen and (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links ul,
    .footer-services ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .footer-links li,
    .footer-services li {
        margin-bottom: 0;
    }
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* 响应式基础样式 */
@media screen and (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu li a {
        padding: 15px 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-info img {
        margin: 0 auto 15px;
    }

    .page-banner {
        padding: 60px 0;
    }

    .page-banner h1 {
        font-size: 32px;
    }
}